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Marquise|Lab Grown|IGI

1.28ct F IF Marquise Lab Grown Diamond

EX • F/IF • IGI LG775631966

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG775631966

Diamond specifications and retailer prices

From $833 NZD
As of November 4, 2026
Save $1,638 NZD (66%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,686 NZD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.28ct lab-grown marquise diamond

This 1.28ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG775631966 or 775631966. Listed at 9 retailers as of November 2, 2026, with a 197% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
F
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG775631966
Dimensions10.72 × 5.79 × 3.60 mm
L/W Ratio1.85
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.72 mm5.79 mm1.28 ctF / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG775631966
Side View
Table 57.0%Crown 35.7°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $2,686 NZD|Low: $833 NZD|High: $2,731 NZD|Avg: $1,653 NZD|-1.6%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 7$833 NZD
Retailer 4$996 NZD
Retailer 2$1,069 NZD
Retailer 6$1,199 NZD
Retailer 5$1,606 NZD
Retailer 8$2,072 NZD
Retailer 9$2,124 NZD
Retailer 3$2,471 NZD
Rare Carat$2,686 NZD

44 data points across 9 retailers

9 retailers$833 NZD to $2,471 NZD

A
Cheapest Retailer
-
$833 NZD
Retailer 2
-
$996 NZD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$1,069 NZD
View
A
Retailer 4
-
$1,199 NZD
View
B+
Retailer 5
-
$1,606 NZD
View
B
Retailer 6
-
$2,072 NZD
View
Retailer 7
-
$2,124 NZD
View
Price last confirmed 34 days ago
B
Retailer 8
-
$2,471 NZD
View
Most Expensive
Rare Carat
HP6314_l_775631966 · Oct 28
$2,686 NZD
$1,510 USD
View
Price last confirmed 8 days ago
8 more retailers have this diamond
Prices start from $833 NZDSave up to $1,638 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.28ct Marquise
$833 NZD